__________at the door before you enter the office,or you’ll be considered impolite A. Knocking B. Kn...
2022-11-22 14:14:47 118次 2013-2014学年山东省高三第一次模拟考试(三诊)英语试卷(解析版) 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容:
__________at the door before you enter the office,or you’ll be considered impolite
A. Knocking B. Knocked C. Knock D. To knock
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